Heteroskedasticity in Crop Yield Models
This study examines three alternative models of correcting for heteroskedasticity in wheat yield: the time trend variance, the GARCH, and an econometric model that includes the potential sources of heteroskedasticity. Nonnested test results suggest that modeling the sources of heteroskedasticity is the preferred procedure. Including potential sources of heteroskedasticity as explanatory variables removed the heteroskedasticity in the sample wheat yields. The results also suggest that the GARCH specification is a promising model of correcting for heteroskedasticity when the sources cannot be identified. The time trend variance model alone may misspecify the true variance structure.
(This abstract was borrowed from another version of this item.)
|Date of creation:||Jun 1991|
|Date of revision:|
|Contact details of provider:|| Postal: |
Phone: (701) 231-7441
Web page: http://www.ext.nodak.edu/homepages/aedept/
More information through EDIRC
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- A. J. Singh & D. Byerlee, 1990. "Relative Variability In Wheat Yields Across Countries And Over Time," Journal of Agricultural Economics, Wiley Blackwell, vol. 41(1), pages 21-32.
- Just, Richard E. & Pope, Rulon D., 1978. "Stochastic specification of production functions and economic implications," Journal of Econometrics, Elsevier, vol. 7(1), pages 67-86, February.
- Satheesh V. Aradhyula & Matthew T. Holt, 1988.
"GARCH Time Series Models: An Application to Retail Livestock Prices,"
Center for Agricultural and Rural Development (CARD) Publications
88-wp29, Center for Agricultural and Rural Development (CARD) at Iowa State University.
- Aradhyula, Satheesh V. & Holt, Matthew T., 1988. "Garch Time-Series Models: An Application To Retail Livestock Prices," Western Journal of Agricultural Economics, Western Agricultural Economics Association, vol. 13(02), December.
- Satheesh V. Aradhyula & Matthew T. Holt, 1988. "GARCH Time Series Models: An Application to Retail Livestock Prices," Food and Agricultural Policy Research Institute (FAPRI) Publications 88-wp29, Food and Agricultural Policy Research Institute (FAPRI) at Iowa State University.
When requesting a correction, please mention this item's handle: RePEc:ags:nddsps:121402. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (AgEcon Search)
If references are entirely missing, you can add them using this form.